ECE 493/593: Mechanics of Engineering Systems
Fall 2008
HOMEWORK #1
1. A uniform beam of mass M and length r has weights W1 and W2 at two positions, as
W
illustrated below. Find the position x such that the normal force at O will be 1 .
2
r/4
d
r/2
W1
P
W
SAMPLE TEST PROBLEMS #1
ECE 350: Electromechanics
Summer 2011
[1]
The load below draws a real power of 100 W from the source, and the
magnitude of the current is 10 A. The magnitude of the source voltage is 250 V,
Assuming 60 Hz operation, calculate the v
Sci EN
0 SPECIAL ASSIGNMENT #1
ECE 350: Electric Power & Machines
Two balanced parallel loads are fed by two transmission lines from separate sources as
illustrated below. Each transmission line has a series impedance of 10+i50 9. Load 1 is
a balanc
EXAMINATION #2
ECE 350: Electric Power and Machines
Summer 2011
Name: [
> This exam is open book and notes.
> You must show your work to receive full credit.
> Be sure to include units on your answers as appropriate.
> No materials or calculators may be s
EXAMINATION #1
ECE 350: Electric Power and Machines
Summer 2011
Name:
> This exam is open book and notes.
> You must show your work to receive full credit.
> Be sure to include units on your answers as appropriate.
> No materials or calculators may be sh
PRACTICEPROBLEMSFOREXAMINATION#2
(thisislongerthananactualexamination)
ECE350:ElectricPowerandMachines
Spring2012
[1]
Threesinglephasetransformersareeachratedat500kVA,60Hz,7200V/480V.They
are connected on the lowvoltage side and Y on the highvoltage side.
SpecialAssignment#3
ECE350:ElectricPowerandMachines
Spring2012
A threephase, 60 Hz, 2250 HP, 1786 RPM, 4 pole, 2300 V induction motor has the following
equivalentcircuitparameters:
0.029
0.226
0.022
13.04
1) Determinethespeedatwhichmaximumtorqueisdeve
SAMPLE TEST PROBLEMS #1
ECE 350: Electromechanics
[1]
The load below draws a real power of 100 W from the source, and the
magnitude of the current is 10 A. The magnitude of the source voltage is 250 V,
Assuming 60 Hz operation, calculate the value of the
gﬂLl/LTEOH
SPECIAL ASSIGNMENT #1
ECE 350: Electric Power 8: Machines
A single-line diagram and schematic for a power system are provided below. Two
balanced parallel loads are fed by two transmission lines from separate sources as
illustrated. Load 2a
Actuator System Development
System with Variable Definitions
mot
mot
J mot
Ngear
cfw_
Nscrew
ML
cfw_
Mnut
Bmot
Kscrew
Bgear+ Bscrew + Bbear
x nut
KL
FL
gear
J gear
xL
System Equations of Motion
&
&gear =
(
K
K
screw
gear + K L x L screw + K L x nut
University of Alabama
Department of Physics and Astronomy
Department of Electrical and Computer Engineering
PH 495/ECE 493 LeClair & Kung
Spring 2011
Problem Set 5
Instructions:
1. Answer all questions below. All questions have equal weight.
2. Show your
ECE 383 - Microcomputers
Fall 2009 Homework 1 Solution
Problem 1: The microcomputer is a combination of hardware and software that can perform specific tasks
according to inputs, occupying a tiny space compared to minicomputer and mainframe computer. The
ECE 383 - Microcomputers Fall 2009 Homework 2 Solution
Problem 1 Given the following codes, what will the resulting values be at the break points for the memories and registers? ORG $1000 REMAINDER STR SUM TEMP
$1000 $1001 $1002 $1003 $1004 $1005 $1006 $1
ECE 383 - Microcomputers Fall 2009 Quiz 3 Solution
Instructions: 1. Please write your name and student number in the upper right hand corner of the back of this sheet. 2. When you are finished answering the questions, fold the paper in half lengthwise wit
ECE 383 - Microcomputers Fall 2009 Quiz 4 Solutions
Instructions: 1. Please write your name and student number in the upper right hand corner of the back of this sheet. 2. When you are finished answering the questions, fold the paper in half lengthwise wi
ECE 383 - Microcomputers
Fall 2009 Quiz 5 Solutions
Instructions:
1. Please write your name and student number in the upper right hand corner of the back of this sheet.
2. When you are finished answering the questions, fold the paper in half lengthwise wi
ECE 383 - Microcomputers Fall 2009 Homework 4 Solutions
[1] Given the following codes, what will the resulting values be at the break points for the memories and registers? (All the breakpoints are independent with each other) #include ECE383_Dragon12plus
SOLUTION
ECE 455/555: Mechanics of Engineering Systems
Fall 2010
HOMEWORK #1
1. A uniform beam of mass M and length r has weights W1 and W2 at two positions, as
W
illustrated below. Find the position x such that the normal force at O will be 1 .
2
r /4
d
ngLATIoN
Special Assignment #2
ECE 350: Electric Power and Machines
Consider the power system below: 2514\‘fJ 1.1552. 1123’: 2 = It 1151*? 77"5 2‘
4 .n.
X2 1 t: ' 30. 5 “'15
a 3
E ~ 1 +' .7‘tl
y_Y 29“ (DHZS 33
L4 ~—
X3 YE: : la'wY
at
Gi
X1
L